Preheat your oven to 350°F (175°C).
Cut the kunafa dough into small pieces and spread it evenly on a baking tray. Bake for 15–20 minutes, or until golden brown and crispy. Remove from the oven and let it cool completely.
Melt the milk chocolate in the microwave using 30-second intervals, stirring between each interval until smooth. You can also melt it using a double boiler on the stovetop.
In a bowl, combine the toasted kunafa, pistachio butter, and chopped pistachios (if using). Mix until everything is well coated.
Wash and thoroughly dry the berries.
Using a chocolate candy mold (I used a donut mold for a fun twist), place a few pieces of mixed berries into each cavity.
Spoon or pipe a thin layer of melted milk chocolate into the mold, making sure it surrounds the berries.
Add a generous spoonful of the pistachio-kunafa mixture to the center of each mold.
Top with more melted milk chocolate to completely seal each bar.
Drizzle or swirl the melted white chocolate over the tops for a decorative finish.
Refrigerate for about 2 hours, or until completely firm.
Carefully remove from the mold and enjoy!